diff --git a/.idea/dictionaries/bt.xml b/.idea/dictionaries/bt.xml
index 4bc384823d..a4f9e376ff 100644
--- a/.idea/dictionaries/bt.xml
+++ b/.idea/dictionaries/bt.xml
@@ -20,6 +20,7 @@
       <w>fakeyou</w>
       <w>ffprobe</w>
       <w>ghibli</w>
+      <w>gottagofast</w>
       <w>greenlight</w>
       <w>greenlighting</w>
       <w>greenlit</w>
diff --git a/crates/lib/actix_cors_configs/src/configs/gottagofast.rs b/crates/lib/actix_cors_configs/src/configs/gottagofast.rs
index ee0437073d..b83348ff21 100644
--- a/crates/lib/actix_cors_configs/src/configs/gottagofast.rs
+++ b/crates/lib/actix_cors_configs/src/configs/gottagofast.rs
@@ -1,7 +1,67 @@
 use actix_cors::Cors;
+use log::warn;
+use url::{Host, Url};
 
 pub fn add_gotta_go_fast_test_branches(cors: Cors, _is_production: bool) -> Cors {
   cors.allowed_origin("http://localhost:5173")
       .allowed_origin("https://pipeline-gottagofast.netlify.app")
       .allowed_origin("https://test--pipeline-gottagofast.netlify.app")
+      // Allow Netlify domains within "gottagofast" project.
+      .allowed_origin_fn(|origin, _req_head| {
+        let maybe_url = origin.to_str()
+            .map(|origin| Url::parse(origin));
+
+        let url = match maybe_url {
+          Ok(Ok(url)) => url,
+          _ => {
+            warn!("Invalid origin: {:?}", origin);
+            return false
+          },
+        };
+
+        match url.host() {
+          Some(Host::Domain(domain)) => {
+            let is_netlify_domain = domain == "pipeline-gottagofast.netlify.app";
+            let is_netlify_branch_deploy = domain.ends_with("--pipeline-gottagofast.netlify.app");
+
+            is_netlify_domain || is_netlify_branch_deploy
+          },
+          _ => false,
+        }
+      })
+}
+
+//
+
+#[cfg(test)]
+mod tests {
+  use reusable_types::server_environment::ServerEnvironment;
+
+  use crate::cors::build_cors_config;
+  use crate::testing::assert_origin_invalid;
+  use crate::testing::assert_origin_ok;
+
+  #[actix_rt::test]
+  async fn gotta_go_fast_main() {
+    let production_cors = build_cors_config(ServerEnvironment::Production);
+    assert_origin_ok(&production_cors, "https://pipeline-gottagofast.netlify.app").await;
+  }
+
+  #[actix_rt::test]
+  async fn gotta_go_fast_branch_deploy() {
+    let production_cors = build_cors_config(ServerEnvironment::Production);
+    assert_origin_ok(&production_cors, "https://test--pipeline-gottagofast.netlify.app").await;
+  }
+
+  #[actix_rt::test]
+  async fn gotta_go_fast_deploy_preview() {
+    let production_cors = build_cors_config(ServerEnvironment::Production);
+    assert_origin_ok(&production_cors, "https://deploy-preview-86--pipeline-gottagofast.netlify.app").await;
+  }
+
+  #[actix_rt::test]
+  async fn invalid_netlify_preview_deploy() {
+    let production_cors = build_cors_config(ServerEnvironment::Production);
+    assert_origin_invalid(&production_cors, "https://deploy-preview-86--unrelated-project.netlify.app").await;
+  }
 }
diff --git a/crates/lib/actix_cors_configs/src/cors.rs b/crates/lib/actix_cors_configs/src/cors.rs
index 7e190232b2..b66f314a27 100644
--- a/crates/lib/actix_cors_configs/src/cors.rs
+++ b/crates/lib/actix_cors_configs/src/cors.rs
@@ -2,8 +2,8 @@ use actix_cors::Cors;
 use log::info;
 
 use reusable_types::server_environment::ServerEnvironment;
-use crate::configs::development_only::add_development_only;
 
+use crate::configs::development_only::add_development_only;
 use crate::configs::fakeyou::{add_fakeyou, add_fakeyou_dev_proxy};
 use crate::configs::gottagofast::add_gotta_go_fast_test_branches;
 use crate::configs::legacy::{add_legacy_storyteller_stream, add_legacy_trumped, add_legacy_vocodes, add_power_stream};
@@ -62,44 +62,13 @@ fn do_build_cors_config(is_production: bool) -> Cors {
 
 #[cfg(test)]
 mod tests {
-  use actix_cors::Cors;
-  use actix_http::body::{BoxBody, EitherBody};
-  use actix_web::dev::{ServiceResponse, Transform};
-  use actix_web::http::StatusCode;
-  use actix_web::test;
-  use actix_web::test::TestRequest;
-  use speculoos::asserting;
-
   use reusable_types::server_environment::ServerEnvironment;
 
+  use crate::testing::assert_origin_invalid;
+  use crate::testing::assert_origin_ok;
+
   use super::build_cors_config;
 
-  async fn make_test_request(cors: &Cors, hostname: &str) -> ServiceResponse<EitherBody<BoxBody>> {
-    let cors= cors.new_transform(test::ok_service())
-        .await
-        .unwrap();
-
-    let request = TestRequest::default()
-        .insert_header(("Origin", hostname))
-        .to_srv_request();
-
-    test::call_service(&cors, request).await
-  }
-
-  async fn assert_origin_ok(cors: &Cors, hostname: &str) {
-    let response = make_test_request(cors, hostname).await;
-    asserting(&format!("Hostname {} is valid", hostname))
-        .that(&response.status())
-        .is_equal_to(StatusCode::OK);
-  }
-
-  async fn assert_origin_invalid(cors: &Cors, hostname: &str) {
-    let response = make_test_request(cors, hostname).await;
-    asserting(&format!("Hostname {} is invalid", hostname))
-        .that(&response.status())
-        .is_equal_to(StatusCode::BAD_REQUEST);
-  }
-
   #[actix_rt::test]
   async fn test_fakeyou_production() {
     let production_cors = build_cors_config(ServerEnvironment::Production);
diff --git a/crates/lib/actix_cors_configs/src/lib.rs b/crates/lib/actix_cors_configs/src/lib.rs
index 538767a1b5..1cecab1089 100644
--- a/crates/lib/actix_cors_configs/src/lib.rs
+++ b/crates/lib/actix_cors_configs/src/lib.rs
@@ -22,3 +22,6 @@
 pub mod cors;
 
 pub (crate) mod configs;
+
+#[cfg(test)]
+pub (crate) mod testing;
diff --git a/crates/lib/actix_cors_configs/src/testing.rs b/crates/lib/actix_cors_configs/src/testing.rs
new file mode 100644
index 0000000000..473b92f0a5
--- /dev/null
+++ b/crates/lib/actix_cors_configs/src/testing.rs
@@ -0,0 +1,33 @@
+use actix_cors::Cors;
+use actix_http::body::{BoxBody, EitherBody};
+use actix_http::StatusCode;
+use actix_web::dev::{ServiceResponse, Transform};
+use actix_web::test;
+use actix_web::test::TestRequest;
+use speculoos::asserting;
+
+pub (crate) async fn assert_origin_ok(cors: &Cors, hostname: &str) {
+  let response = make_test_request(cors, hostname).await;
+  asserting(&format!("Hostname {} is valid", hostname))
+      .that(&response.status())
+      .is_equal_to(StatusCode::OK);
+}
+
+pub (crate) async fn assert_origin_invalid(cors: &Cors, hostname: &str) {
+  let response = make_test_request(cors, hostname).await;
+  asserting(&format!("Hostname {} is invalid", hostname))
+      .that(&response.status())
+      .is_equal_to(StatusCode::BAD_REQUEST);
+}
+
+async fn make_test_request(cors: &Cors, hostname: &str) -> ServiceResponse<EitherBody<BoxBody>> {
+  let cors= cors.new_transform(test::ok_service())
+      .await
+      .unwrap();
+
+  let request = TestRequest::default()
+      .insert_header(("Origin", hostname))
+      .to_srv_request();
+
+  test::call_service(&cors, request).await
+}